Cyrus Clark

There’s something a little intimidating about an 8,000-square-foot, seven-bedroom single-family mansion that once belonged to “the father of the West Side” himself. The property in question is 327 West 76th Street, in the Riverside Drive area of the Upper West Side.

The home was built in 1892 and quickly sold to Cyrus Clark, a businessman who retired from the silk business and went into real estate, making it his mission to campaign on behalf of developing Manhattan’s West Side. The house wasn’t distinct just for its owner, but because the exterior architecture stands out so distinctly in a row of more refined townhouses. For years the home was broken up into apartments, but developer Leonard Zelin converted it back to a single-family a few years back. Now he’s hoping the investment will pay off: Zelin bought the townhouse for $8.8 million in 2010 and it’s now asking an impressive $18.995 million.